Obligatory MS2PNP beginner issues
 

So I purchased a MS2PNP and installed it on my 1999 yesterday. After setting ignition timing I still noticed some unsee issues. When getting back into my car this morning it seemed to have re-flashed itself. Now I know I burned the ecu before disconnecting and decided to reload my tune. That fixed the issue. Next I noticed my car running extremely lean at idle 10-12 afr. I retuned it to stay at 14.6 while the car was at operating temperature. I began to street tune it after this. While driving the car hesitated at the first tip of throttle. I believed this was part of my acceleration enrichment tune so while I stopped to readjust it the car stalled. I then restarted it but every time I went to change the tune the car kept stalling. I then ate some dinner and when I fired the car it had the same issue this morning! It did not want to start and remained at extremely low fluctuating idle/stalling. I am now here confused and regretting my purchase. The car is completely besides a different intake and no precat in the headers. PLZ HELP!!!!

Yeah that's not how it works. Based on that statement I would highly recommend you reinstall the factory ecu and spend about 50 hours reading/researching before putting the megasquirt back in.

If you're not willing to do that you'll need to post logs of the issue so we can help.

To clarify, the richer it is the lower the AFR number. That's the opposite of your statement.

All the info you need is in this forum. Read the stickies. The msextra forum is excellent as well.

If you have a specific problem google it. If you aren't sure what a setting does research it until you understand it completely. Then make changes.

We live in a magically time where nearly everything you could ever want to know is available for free. The most useful skill you'll ever learn is how to use a search engine.

We can't help without a log.

Need the current log and tune. Yes i know you uploaded it, but give us what you got.
What procedure did you do to set timing?
Are you running the MAF still or not?
is your engine bay completely stock?
what wideband are you running? Did you wire and calibrate the wideband properly? did you calibrate your thermistor tables and TPS for your year model?
where did you buy your MS, and where did you source a base tune? Is the firmware the latest version?
what is the end goal for your megasquirt equipped car?

all of these questions should have went through your head already, if you have truly read our forums and spent time here. but I also dont blame you, its a daunting task to sort through all the flame and to MS your car.

update
 

After some more fiddling and switching to the wideband. This is my current tune and now data log. The car is not reading the afr correcting I believe as the gauge on Tuner studio switches from 16.1 to 12.1 randomly. The car again is completely stock with CAI and catless headers. I am currently tuning this NA to get experience before turbo. The wideband I believe is calibrated and I know tps and AIT (GM) is set up correctly. The firmware is the latest version.

Yep fix your wideband. Can't do any tuning without it. Did you go here and tell TS what wideband you're using?

https://cimg6.ibsrv.net/gimg/www.mia...823f5e0076.png

Your wideband display and tunerstudio are both showing 7.5 afr?

Well that's an obvious problem isn't it?

I'm not convinced you're misfiring. AFR would go super lean in the event of a misfire. An inductive timing light doesn't work well for what you're using it for.

Fix your wideband settings so you can actually progress with tuning.

For the love of christ keep your shit in one thread. Multiple threads revolving around the same botched MS install will not get your shit running more quickly.

2. Do you have fuel shut off turned on? It runs rich because of accel enrichment needs better tuned for negative TPSdot, then probably goes into fuel shut off (which is good).

Sorry it's been a while since I've been in TunerStudio, looks like the decel isn't handled as negative TPSdot, but there's a %multiplier for decel. Read this: https://www.diyautotune.com/support/...el-enrichment/

Fuel shut off is called over run fuel or something like that.

Have you at least read through this for setting up your MSpnp2?

http://www.msextra.com/doc/pdf/Megas...ing_Up-3.4.pdf

There are 2 settings for fuel cut that could be what you're describing.

1. Overrun Fuel Cut
2. Decel Fuel Amount - Under AE settings

Did you first calibrate the wideband by itself in open air then calibrate it within TS? What do you mean the wideband's instruction chart? Do you mean you set up a custom voltage range using the values from the widebands instructions?

Your arm x series does not need calibration out of the box. Adjust voltage values until the gauge matches TS. There are several threads on this

Extremely rich and lean
 

Needs more info. Methinks you should've spent more time getting the issues sorted out while N/A before "installing a turbo."

Let alone don't tell us anything about your setup since we're all mind readers here...

I mean, don't bother posting a datalog either.

Yeah you need to remove the turbo, do a LOT more reading, then get your car running naturally aspirated with bigger injectors and THEN think about installing the turbo.

edit: at least, you need to do that if you want any of the more knowledgeable people here to help you.

If fuel cut isn't turning on anymore, you probably have a vacuum leak in your Intake Manifold, causing it to never go low enough KPA to trigger fuel cut.
You definitely need to get your turbo off and sort your tune out.
It took me months and months and months to get an understanding enough where I can happily tune my car good enough, then I put on my turbo and was able to understand what was going on and what needed changing and shit I still have ages to go before I would be able to get the most out of the engine and truly tune every thing perfectly.

You need to give us way more information, photos of your setup, engine bay, changes you make, logs, logs when your doing pulls, put markers on the log (hit spacebar when logging) and tell us what you were doing in the car when that happened.
Then maybe someone will come help you more.
You have to take it into your own hands and read EVERYTHING.
DiyAutoTune has some great articles on tuning stuff, theres a wordpress site called roadsterzoku which also has some good info on setting up a miata with megasquirt.
read read read, take off your turbo, get your car working and running WELL on N/A then come back.
Don't touch things like Accel enrichment till your Fuel VE Tables are good, one badly configured fuel amount, plus another badly configured fuel amount makes for a very badly fueled car and you won't know which one is wrong.